malloc: allow removing memory from named heaps

[dpdk.git] / lib / librte_eal / common / rte_malloc.c

diff --git a/lib/librte_eal/common/rte_malloc.c b/lib/librte_eal/common/rte_malloc.c
index ffa945d..fcd5613 100644 (file)
--- a/lib/librte_eal/common/rte_malloc.c
+++ b/lib/librte_eal/common/rte_malloc.c
@@ -378,6 +378,45 @@ unlock:
        return ret;
 }
 
+int
+rte_malloc_heap_memory_remove(const char *heap_name, void *va_addr, size_t len)
+{
+       struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+       struct malloc_heap *heap = NULL;
+       int ret;
+
+       if (heap_name == NULL || va_addr == NULL || len == 0 ||
+                       strnlen(heap_name, RTE_HEAP_NAME_MAX_LEN) == 0 ||
+                       strnlen(heap_name, RTE_HEAP_NAME_MAX_LEN) ==
+                               RTE_HEAP_NAME_MAX_LEN) {
+               rte_errno = EINVAL;
+               return -1;
+       }
+       rte_rwlock_write_lock(&mcfg->memory_hotplug_lock);
+       /* find our heap */
+       heap = find_named_heap(heap_name);
+       if (heap == NULL) {
+               rte_errno = ENOENT;
+               ret = -1;
+               goto unlock;
+       }
+       if (heap->socket_id < RTE_MAX_NUMA_NODES) {
+               /* cannot remove memory from internal heaps */
+               rte_errno = EPERM;
+               ret = -1;
+               goto unlock;
+       }
+
+       rte_spinlock_lock(&heap->lock);
+       ret = malloc_heap_remove_external_memory(heap, va_addr, len);
+       rte_spinlock_unlock(&heap->lock);
+
+unlock:
+       rte_rwlock_write_unlock(&mcfg->memory_hotplug_lock);
+
+       return ret;
+}
+
 int
 rte_malloc_heap_create(const char *heap_name)
 {